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About product and suppliers:
        Alibaba.com offers 86 dn 40mm gi pipe class c products. About 6% of these are steel pipes. 

A wide variety of dn 40mm gi pipe class c options are available to you, such as 10#, 16mn, and st37. You can also choose from api, bs, and astm. As well as from erw, hot rolled. 

There are 6 dn 40mm gi pipe class c suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of dn 40mm gi pipe class c respectively. 

Dn 40mm gi pipe class c products are most popular in Mid East, South Asia, and Oceania.